Had a quick search & apparently there were some copies in Curry's for £4.99, but stock had sold out. Amibees is currently quoting this as £8.99 under a list of softuk offers, so this is a good price as it's available.

My Son has this game & enjoys it. He also wants Spongebob & Picto Image for the DS. It uses the stylus & makes the game fun if your kids like that sort of thing.